The Woman From Several Different Dreams

I had this notion that a person, a conscious individual could be born inside our dreams. Born there out of the mix of memories we have about many people. It would be like a collage but once established would take on a personality of its own. I’m not talking about someone who is suffering from mental illness and hallucinates, or someone who is suffering from multiple personalilty disorder. This would be a real person. Would there be a conflict between this person and the host? Perhaps. There could be an attempt by the new person to stage a coup. That is possible. But more likely that new personality would become somehow alligned with the host personality and they could be at peace with each other. Well, its just an idea.